2.7.13. Goodbys Creek

2.7.13.1. About Goodbys Creek

Figure 2.44
Figure 2.45 The Goodbys Creek Tributary (WBID 2326).
  • East of the St. Johns River opposite NAS Jacksonville
  • Primary Land Use: Residential
  • Current TMDL reports: Fecal Coliform with BMAP (2009)
  • Verified Impaired 2016 (final): None
  • WBID Area: 5.1 sq. mi.
  • Beneficial Use: Class III F (Recreational – Freshwater)

2.7.13.2. Data sources

Result data were downloaded from the FL STORET website (DEP 2010e) and filtered based on the stations (DEP 2010f) in Goodbys Creek WBID 2326 (DEP 2014d) shown above. The filtered dataset was used to generate Table 2.14.

2.7.13.3. Discussion

Water quality data for Goodbys Creek are shown in Table 2.14. Average phosphorus levels in Goodbys Creek exceeded the recently updated WQC (EPA 2010b); however, average total nitrogen, dissolved oxygen and chlorophyll-a concentrations were within acceptable limits. The fecal coliform level, averaged over all the stations in Goodbys Creek, is below the critical level of 2.6, which is the logarithm of the state maximum of 400 colony-forming-units per 100 mL. Analysis by station is shown in Figure 2.46, going from the furthest downstream, within the mainstem of the St. Johns River, to the furthest upstream. The average remains at or above the state maximum until station 20030899 near Old Kings Road.

A TMDL report is available for fecal coliform in Goodbys Creek (Wainwright 2005b). (Note: the data analyses in the TMDL are based on different criteria than that used in this report). Subsequently, a BMAP for Goodbys Creek was legally adopted in 2009 (DEP 2009b). Annual Progress Reports for this BMAP were issued in 2011 (DEP 2011a), 2012 (DEP 2012), and 2013 (DEP 2013a); they list repairs, inspections, evaluations, and other improvements conducted by JEA, the Duval County Health Department, COJ, and FDOT.

Table 2.14 Water quality data for Goodbys Creek.
Concentration
ParameterWater Quality Criteria (SW)LowAverageHighSamplesSampling Period
Dissolved Oxygen (mg/L)34% sat. (~3.0)0.25.0512.353351999 - 2014
Total Nitrogen (mg/L)<1.54‡0.340.772.06651999 - 2012
Total Phosphorus (mg/L)<0.12‡0.010.052.041081999 - 2012
Chlorophyll-a (μg/L)<20‡0.355.2160602002 - 2012
Arsenic (μg/L)≤501.979.8619.1212004 - 2005
Cadmium (μg/L)≤0.300.182.3372003 - 2005
Copper (μg/L)≤9.30.071.185.22332003 - 2005
Lead (μg/L)≤3.20.010.684.95282003 - 2005
Nickel (μg/L)≤5201.366.47352003 - 2005
Silver (μg/L)≤0.070.040.180.582004 - 2005
Zinc (μg/L)≤1200.243.6416.12452003 - 2005
Fecal Coliform (log #/100 mL)<2.6‡0.652.674.632581999 - 2014
Turbidity (NTU)<2928.0659.4761999 - 2013
Note: Hardness-dependent freshwater criteria for cadmium, copper, lead, nickel, and zinc were generated based on a hardness concentration of 100 mg/L.
FW = freshwater; SW = saltwater (marine). Values denoted with (*) indicate a proposed criterion, which has not yet been adopted.
Values denoted with (‡) are reference values based on EPA criteria (EPA 2010b), but the water body is not regulated by this standard.

 

Figure 2.45
Figure 2.46 Fecal coliform in Goodbys Creek from downstream to upstream. Data are presented as the log of number of fecal coliform bacteria per 100 mL; the maximum, mean, and minimum values at each station are shown.